NCA9539BY-Q100HP

I/o Expanders Overview

The NCA9539BY-Q100HP is a low-voltage 16-bit I/O expander designed for automotive applications, qualified to AEC-Q100 Grade 1 standards. It operates within a supply voltage range of 1.65 V to 5.5 V and supports Fast-mode I²C bus communication up to 400 kHz. The device provides 16 general-purpose input/output pins housed in an HWQFN24 package (SOT8041-1). Key electrical parameters include a maximum standby current of 4 µA, latched outputs with a 25 mA drive capability, and Schmitt-trigger inputs on SCL and SDA lines. It features an open-drain active LOW interrupt output and an active LOW reset pin.

I/o Expanders Feature Summary

• Automotive-grade qualification compliant with AEC-Q100 Grade 1 specifications
• Configurable 16-bit GPIO interface with dedicated interrupt and reset functionality
• Wide operating voltage range supporting 1.65 V to 5.5 V power supplies
• Hardware-selectable slave addresses allowing multiple devices on a single bus

I/o Expanders Applications

• ACPI power switches
• Sensor interfaces
• Push button arrays
• LED control circuits
• Fan control systems

I/o Expanders Procurement Notes

Verify the specific ordering suffix HP against the manufacturer's latest documentation to confirm package type and tape-and-reel specifications. Ensure the component meets the required AEC-Q100 Grade 1 automotive reliability standards before integration into final designs.

I/o Expanders Selection Notes

Select this component when a 16-bit expansion is required alongside hardware interrupt signaling and external reset capabilities. The HWQFN24 package is suitable for space-constrained PCB layouts requiring thermal enhancement. Verify that the system voltage falls within the 1.65 V to 5.5 V operational range.

I/o Expanders Part Context

This part belongs to the NCA9539-Q100 series of low-power I/O expanders. It shares functional similarities with other members like the NCA9539PW-Q100J but differs in physical packaging. The BY suffix indicates the HWQFN24 package variant, while the HP suffix denotes specific manufacturing or packaging details defined by Nexperia.

I/o Expanders Replacement Considerations

The NCA9539PW-Q100J serves as a functional equivalent offering identical electrical characteristics in a TSSOP24 package. Designers must account for the physical footprint differences between the HWQFN24 and TSSOP24 packages during substitution.